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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Created: (CASSANDRA-1028) NPE in AntiEntropyService.getNeighbors
Date Tue, 27 Apr 2010 15:25:34 GMT
NPE in AntiEntropyService.getNeighbors
--------------------------------------

                 Key: CASSANDRA-1028
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1028
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Jonathan Ellis
            Assignee: Stu Hood
             Fix For: 0.7


Sometimes, but not always, I see this during a test run:

    [junit] Testsuite: org.apache.cassandra.service.AntiEntropyServiceTest
    [junit] Tests run: 10, Failures: 0, Errors: 0, Time elapsed: 3.189 sec
    [junit] 
    [junit] ------------- Standard Error -----------------
    [junit] ERROR 10:19:09,743 Error in executor futuretask
    [junit] java.util.concurrent.ExecutionException: java.lang.NullPointerException
    [junit] 	at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
    [junit] 	at java.util.concurrent.FutureTask.get(FutureTask.java:83)
    [junit] 	at org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor.afterExecute(DebuggableThreadPoolExecutor.java:87)
    [junit] 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:888)
    [junit] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    [junit] 	at java.lang.Thread.run(Thread.java:637)
    [junit] Caused by: java.lang.NullPointerException
    [junit] 	at java.util.AbstractCollection.addAll(AbstractCollection.java:303)
    [junit] 	at org.apache.cassandra.service.AntiEntropyService.getNeighbors(AntiEntropyService.java:151)
    [junit] 	at org.apache.cassandra.service.AntiEntropyService.rendezvous(AntiEntropyService.java:176)
    [junit] 	at org.apache.cassandra.service.AntiEntropyService.access$100(AntiEntropyService.java:86)
    [junit] 	at org.apache.cassandra.service.AntiEntropyService$Validator.call(AntiEntropyService.java:487)
    [junit] 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    [junit] 	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    [junit] 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    [junit] 	... 2 more
    [junit] ------------- ---------------- ---------------

Ideally it would be nice if this could cause an actual test failure when it happens.  Not
sure how feasible that is.

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